Our experts and Cambridge Representative will be showing an NCMA (National Concrete Masonry Association) approved retaining wall video that covers everything you will need to understand about how to build a structurally sound segmental retaining wall and double sided (free standing) wall. They will also share videos on the ease of installing pre-packaged fire pits and pre-built fireplaces. Q & A session after each video. REFRESHMENTS SERVED. FREE EVENT.